I remodeled two of our baths, had to do this when wife did not like placement. Get a carbide drill, or whatever they call the drill that will cut thru tile. Put five or six holes in the thing. It is held on with silicone but I bet the tiler then used grout around the edges. Just take a small chisel and knock out the perimeter grout. I took a rubber mallet and gently knocked it out. The holes that were drilled kept it from doing damage on the way out. I got this advice from a guy at a tile store. He said he set a lot of tile.....? But it worked very easily for me.